3931648 has 40 divisors (see below), whose sum is σ = 8986032. Its totient is φ = 1683456.

The previous prime is 3931639. The next prime is 3931649. The reversal of 3931648 is 8461393.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3931649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3036 + ... + 4132.

Almost surely, 2^3931648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3931648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4493016).

3931648 is an abundant number, since it is smaller than the sum of its proper divisors (5054384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3931648 is an equidigital number, since it uses as much as digits as its factorization.

3931648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122 (or 1106 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 3931648 is about 1982.8383696106. The cubic root of 3931648 is about 157.8307218707.

The spelling of 3931648 in words is "three million, nine hundred thirty-one thousand, six hundred forty-eight".